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This book, of course, owes an enormous amount to the Gang of Four: Gamma, Helm, Johnson, and Vlissides. Without them, the book wouldn’t exist.

Ken Arnold did a spectacular job of reviewing this book. I’ve never experienced a tech review as thorough and as thoughtful as Ken’s. His detailed comments improved this book immensely, and I’m indebted to him.

A small portion of this book appeared originally in my Java Toolbox column on JavaWorld (http://www.javaworld.com).

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